VOKERA RAIN 24 Installation And Servicing Instructions Download Page 10

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24/28/bi

Should this application be preferred, it’s recom-
mended that any openings on the top of the
enclosure are sealed with a suitable silicone seal-
ant in order to minimise the ingress or rainwater.
The use of the enclosure allows the installation
pipework to be installed prior to the appliance
being installed.
Due to the enclosure being installed external to
the property, the flueing arrangements for the
appliance can be simplified.

PREPARATION

Refer to the enclosure instructions (supplied) for
specific installation instructions and details on the
required size of opening.
The enclosure is supplied with ‘knock-out’ panels
that allow the appliance flue outlet to routed to the
left, right, or vertically.
In addition, the flue can be routed through the
front of the enclosure.
The route and termination of the flue outlet must
be considered prior to the installation of the
enclosure.
Refer to the relevant sections within this installa-
tion booklet and the enclosure instructions for
guidance, and Install the pipework and electrical
supply prior to the fixing of the enclosure. Addi-
tionally, if the flue system is to be routed within
the fabric of the property, then it’s advisable to
carry this out before fitting the enclosure.
At this point it will be necessary to remove the
‘knock-out’ panels that are specific to the route
of the flue system and pipework.

FIXING

Secure the enclosure to the wall using the rel-
evant fixing points, taking care to ensure that it is
level and corresponds to the pre-installed
pipework and/or flue system.
Alternatively the enclosure can be secured to an
external wall by modifying the rear panel to
accept fixing screws or bolts.

MOUNTING THE APPLIANCE

Mount the appliance onto the enclosure as indi-
cated in the enclosure instructions.

4.4.2

EXTERNAL APPLICATIONS WITHOUT THE
ENCLOSURE

The Rain boiler can be installed without the
requirement of an enclosure providing that some
form of protection is used to minimise the risk of
water penetration into the appliance (see 4.1.2).

NOTE
The Rain bi must always be installed within
an enclosure.

PREPARATION

Using the template and details at figure 6 as a
guide, secure the appliance wall bracket

to the

external wall and mount the appliance to the wall
bracket.

NOTE

The fixing holes for the wall-mounting bracket
should be drilled and plugged, and an appropriate
type and quantity of fixing should be used to
ensure that the bracket is mounted securely.

4.5

FITTING THE FLUE

The Vokera Uni-flue (concentric) system and the
80mm + 80mm parallel (twin) flue system can be
used with the appliance enclosure, whilst the
standard 60/100mm Uni-flue horizontal terminals
can be used on external installations where the
enclosure has not been installed.
In addition the B22 kit can be used on those enclosure
applications that require a simple flue arrangement.
The B22 kit allows air to be taken from the ventilated
enclosure, directly into the appliance and eliminates
the need for an air inlet pipe.
The flue pipe/system can reach temperatures in
excess of 150 °C, and therefore must be insu-
lated or protected to eliminate the risk of injury or
damage to property.
You must ensure that the entire flue system is
properly supported and connected.

FLUE RESTRICTOR RING

To ensure maximum efficiency and correct op-
eration of the appliance, it may be necessary to
fit one of the supplied flue restrictor rings (see fig.
10, item ‘A’) to the appliance flue outlet (see
tables below).

4.5.1

CONCENTRIC HORIZONTAL FLUE

(For concentric vertical flue, see section 4.5.2).
(For twin flue applications, see section 4.5.3).

For internal applications, this appliance must
only be used with the standard 60/100mm
Uni-flue concentric flue system or the Vokera
parallel (twin) system.

NOTE

These instructions relate

only

to the standard 60/

100mm concentric flue terminals (2359029 &
2359119).
The appliance flue outlet elbow can be rotated
through 360º on its vertical axis. In addition the
flue may be extended from the outlet elbow in the
horizontal plane (see 2.9).

The concentric flue pipe should have a fall from
the boiler, to eliminate the possibility of rainwater
entering the appliance via the flue.

Total flue length

Restrictor required

Less than 1 metre

42mm diameter

Less than 2 metres

44mm diameter

Less than 3 metres

46mm diameter

Less than 4.25 metres

Not required

Total flue length